Data converters

Open Data converters on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Page guide

Find the right tool and get straight to your task.

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JSON to CSV

Turn JSON records into a CSV you can open as a table.

CSV to excel

Give your CSV data an Excel workbook of its own.

CSV to JSON

Turn CSV rows into JSON you can use in your next step.

CSV viewer

See your CSV as rows and columns instead of a wall of commas.

Payment card checksum checker

Check the syntax and Luhn checksum of a card number locally. Results are masked. This does not verify a card, bank or payment.

XML to JSON

Change XML data into JSON without retyping it.

Excel to CSV

Take one worksheet out of Excel and save it as CSV.

JSON to excel

Give your JSON records an Excel spreadsheet.

YAML to JSON

Turn YAML data into JSON for your next workflow.

Split CSV

Break a large CSV into smaller files, each with its header.

TSV to CSV

Turn tab-separated data into a comma-separated CSV.

CSV validator

Check CSV headers, quoting and row lengths before using the file.

CSV to SQL

Build SQL statements from your CSV data.

HTML table to CSV

Take a pasted HTML table and save its data as CSV.

CSV to TSV

Change CSV data into tab-separated rows.

All tools (57)

About data converters

These free data converters move information between the formats that spreadsheets, databases and APIs expect. Common jobs include JSON to CSV, CSV to JSON, CSV to Excel, Excel to CSV and XML to JSON, plus YAML, TOML and SQL conversions. Beyond conversion, the CSV viewer, CSV validator, Split CSV and CSV remove duplicates tools help you inspect and clean files, and checkers such as the JSON flattener and Missing data profiler explain what a dataset contains.

Before converting a large file, open it in the CSV viewer or a validator to confirm the delimiter, header row and encoding. Fixing those first prevents shifted columns and broken characters in the output.

Popular data converters

Common questions

Is my data uploaded when I convert a file?

The main converters, including JSON to CSV, CSV to JSON, CSV to Excel, Excel to CSV and XML to JSON, run in your browser. Your file is read and converted on your device and is not sent to our server during the conversion.

How are nested JSON objects handled in CSV?

CSV is a flat table, so nested objects are flattened into column names that show their path. Arrays may be joined or expanded depending on the options. If you need control over the result, run the JSON flattener first and review the columns.

Why do special characters look wrong after conversion?

This usually means the source file uses a different text encoding than expected. Save the original as UTF-8 where possible, then convert again. For Excel, the CSV to Excel tool avoids the encoding guesswork that happens when you open a raw CSV.